尿素的水解反应如下:CO(NH2)2+H2Orarr;2NH3+CO2 无酶存在时反应的活化能为120kJmiddot;mol-1。当尿素酶存在时,反应的活化能降为46kJmiddot;mol-1。设有、无酶存在时反应的频率因子A值相同。 试计算: (1)在298K时,由于尿素酶的催化作用,反应速率是无酶存在时的多少倍? (2)无酶存在时,温度要升高到...
13、,液相中部分 NH3和H2O由于液相平衡分压的存在与 CO2一起进入到气相11。2NH4HCO3(aq) (NH4)2CO3(aq)+CO2(g)+ H2O(l)H=26.8 kJmo1-1 (6)NH4HCO3(aq) NH3(aq)+ CO2 (g)+ H2O (l)H=64.0 kJmo1-1 (7)(NH4)2CO3 (aq) 2NH3(aq)+ CO2(g)+H2O(l)H=100.9 kJmo1-1 (8)NH2COONH4...
CO2 + 3H2 CH3OH + H2O ∆H298 K = −49.5 kJ/mol (1) CO2 + H2 CO + H2O ∆H298 K = 41.2 kJ/mol (2) CO + 2H2 CH3OH ∆H298 K = −90.7 kJ/mol (3) Currently, several types of materials have been used as the catalysts for CO2 hydro- genation to methanol, ...
Since CO2 is quite hydrophilic [26], it is especially interesting that both water and the hydrophilic NH3 exhibit a similar or greater reduction of their permeability by cholesterol when compared to CO2. We may add that Zocher et al. [27] have observed by molecular dynamics simulation a ...
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nanomaterials Article Design of Amine-Modified Zr–Mg Mixed Oxide Aerogel Nanoarchitectonics with Dual Lewis Acidic and Basic Sites for CO2/Propylene Oxide Cycloaddition Reactions Yi-Feng Lin 1,2,*, Yu-Rou Lai 1,2, Hsiang-Ling Sung 1,2, Tsair-Wang Chung 1,2 and Kun-Yi Andrew Lin 3,...
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